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Date: Thu, 24 Jan 2013 21:11:32 +0000
Subject: Re: Dict comp help
From: Oscar Benjamin <oscar.j.benjamin@gmail.com>
To: "Joseph L. Casale" <jcasale@activenetwerx.com>
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Xref: csiph.com comp.lang.python:37634

On 24 January 2013 20:58, Joseph L. Casale <jcasale@activenetwerx.com> wrote:
> Hi,
> Slightly different take on an old problem, I have a list of dicts, I need to build one dict
> from this based on two values from each dict in the list. Each of the dicts in the list have
> similar key names, but values of course differ.
>
>
> [{'a': 'xx', 'b': 'yy', 'c': 'zz'},  {'a': 'dd', 'b': 'ee', 'c': 'ff'}]
>
>
> { 'xx': 'zz', 'dd': 'ff'}
>
>
> Anyone have insight on how to pull this off?
>

Your specification is not exactly clear about how to handle all of the
different cases or what you really want but how about:

>>> l = [{'a': 'xx', 'b': 'yy', 'c': 'zz'}, {'a': 'dd', 'b': 'ee', 'c': 'ff'}]
>>> dict(d.values()[:2] for d in l)
{'xx': 'zz', 'dd': 'ff'}


Oscar